<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <script>
        function change(str) {

            var str = str.replace(/-(\w)/g, function ($, $1) {
                

                return $1.toUpperCase();

            });

            return str;
        }
    </script>
</body>

</html>